My neurologist, in showing me what she was looking at on my MRI scans pointed out to me that elongated oval shaped lesions perpendicular to the ventricles in the periventricular white matter are somewhat characteristic of MS. With that being said, your doctor knows your case history and has access to all of your tests. What I say here is worth exactly what you are paying me for it. Make another appt with your doctor and get his or her input on the scan and form a path forward from there. Even if it is eventually determined to be MS, getting the actual diagnosis can be a long process and you should be prepared to be patient as doctors try to rule out other possibilities. Good luck, and keep us posted on how things are going!